Antenna system and mobile terminal

Abstract

Embodiments of the present disclosure are directed to an antenna system and a mobile terminal. The antenna system includes a metal antenna, a radio frequency module, and an antenna tuning switch. The mobile terminal includes the antenna system mentioned above. An embodiment of the present disclosure is capable of improving the stability of sensor detection and prevent the whole machine from being in a state of power reduction for a long time, resulting in signal deterioration.

What is claimed is: 
     
         1 . An antenna system, comprising:
 a metal antenna, having a first feed point and a second feed point;   a radio frequency module, connected to the first feed point;   an antenna tuning switch, is connected to the second feed point; and   a sensor module, connected between the second feed point and the antenna tuning switch.   
     
     
         2 . The antenna system as claimed in  claim 1 , further comprising:
 a first decoupling unit, connected between the sensor module and the second feed point, for isolating an interference of a radio frequency signal transmitted by the radio frequency module to the sensor module.   
     
     
         3 . The antenna system as claimed in  claim 2 , wherein the first decoupling unit comprises a first inductance with a first inductance value of 440 nH. 
     
     
         4 . The antenna system as claimed in  claim 1 , further comprising:
 a second decoupling unit, disposed between the second feed point and the antenna tuning switch, for isolating an interference of a signal transmitted by the sensor module to the antenna tuning switch.   
     
     
         5 . The antenna system as claimed in  claim 4 , wherein the second decoupling unit comprises:
 a second inductance, connected between the antenna tuning switch and a metal ground plate; and   a first capacitance, connected between the second feed point and the antenna tuning switch.   
     
     
         6 . The antenna system as claimed in  claim 5 , wherein the second inductance value is 100 nH, and the first capacitance value is 0Ω. 
     
     
         7 . The antenna system as claimed in  claim 2 , wherein the antenna tuning switch comprises:
 a multi-channel tuning switch for switching a harmonic frequency; and   an antenna tuner for adjusting an impedance matching between the radio frequency signal and the metal antenna.   
     
     
         8 . The antenna system as claimed in  claim 7 , wherein the antenna tuning switch further comprises a byte-wide peripheral interface (BPI) interface connected to a baseband chip. 
     
     
         9 . The antenna system as claimed in  claim 8 , wherein the sensor module comprises a sensor chip and a general-purpose input/output (GPIO) interface connected to the baseband chip. 
     
     
         10 . A mobile terminal, comprising an antenna system, the antenna system comprising:
 a metal antenna, having a first feed point and a second feed point;   a radio frequency module, connected to the first feed point;   an antenna tuning switch, is connected to the second feed point;   a sensor module, connected between the second feed point and the antenna tuning switch;   a first decoupling unit, connected between the sensor module and the second feed point, for isolating an interference of a radio frequency signal transmitted by the radio frequency module to the sensor module; and   a second decoupling unit, disposed between the second feed point and the antenna tuning switch, for isolating an interference of a signal transmitted by the sensor module to the antenna tuning switch.   
     
     
         11 . The mobile terminal as claimed in  claim 10 , wherein the first decoupling unit comprises a first inductance with a first inductance value of 440 nH. 
     
     
         12 . The mobile terminal as claimed in  claim 10 , wherein the second decoupling unit comprises:
 a second inductance, connected between the antenna tuning switch and a metal ground plate; and   a first capacitance, connected between the second feed point and the antenna tuning switch.   
     
     
         13 . The mobile terminal as claimed in  claim 12 , wherein the second inductance value is 100 nH, and the first capacitance value is 0Ω. 
     
     
         14 . The mobile terminal as claimed in  claim 10 , wherein the antenna tuning switch comprises:
 a multi-channel tuning switch for switching a harmonic frequency; and   an antenna tuner for adjusting an impedance matching between the radio frequency signal and the metal antenna.   
     
     
         15 . The mobile terminal as claimed in  claim 14 , wherein the antenna tuning switch further comprises a byte-wide peripheral interface (BPI) interface connected to a baseband chip. 
     
     
         16 . The mobile terminal as claimed in  claim 15 , wherein the sensor module comprises a sensor chip and a general-purpose input/output (GPIO) interface connected to the baseband chip.